Improved process of forming artificial stone



FRASQJOIS cows :T. or mars, FRASGE, ASSIGXOR- To L. naxorzox. or new YORK orrr.

IMPROVED PROCESS Ol FORMING ARTIFICIALSTONE.

fpccitication forming partof Letters Patent No. $8,549, dated April l, 1865.

1'0 (111 whom it may com-arm licitknownthat ,l-1:. ,ois Comma ,ot the in the departnu-nt ot' the Seine and Empireot' more, have in vented eertain improvements in the M" \nt'arture ot' Artificial Stones; and 1 do here-b eclarethat the follow inc; is a prion thereof, which will enn theart to make and use the able others llltl same. E

This invention relates to the manufacture of starlet-5.1;" umutd llu. snaicmres .rnude by the agglomeration of hydraulic lime, h draulio cement, and sand, properly prepared in the state which lhare established and specified, several times, as pulverulent isle or plastic pow der, and called artificialsrone paste; and the presentinveution consists in the use of heat, or the applicatiou of heat, as hereafter specified, and for the purpose further explained.

I have found, by re ited experiments, that when lime, hydraulic lime, sand, and, in some cases, hydraulic cements, are to he used for the confection of artificial stones, it these substances are previously heated to a proper degree; if hot water is employed for the preparation; if the mill in which the tritur: ion of the substances is offeeted is heated either by the application of ar' tiflcial heat, directly to the easingof the mill, by worms or otherwise, or it live steam is introduced into and through the substances undergoing trituratinn; 1 hare iuund,as 111: e remarked,tl1at in that case the pnlverulent paste which I obtain pus sses, to an extraordinary dc rm, the powerof setting quickly and firmly-in short, of becoming quite hard as soon as it is agglomerated. This affords the greatest advantage for any piece of work that has to be exposed to frost a short time after it is made, and for all hydraulic wo of art and it allows, oft-on '-'1,thc (mnstrnetions to he carried on all through inter, which otherwise would be interrupted by cold weather.

in carrying my invettion into practice, the. sand, th nine, and. the cement may he tirsthcated, ually, by any convenient method, either by air, steam, or contact with heated surfaces. The mill may be heated by the direct action of tire thereon, or by having a steam -jacket or coiled pipe. and in some cases lire stcan: ma be injeeted into the mnidurmg its aenon on the tritnmted snhstanees-in any of these cases the result being the same-t0 bring up and maintain at a proper temperaturev the m tain a hot artificial-stone paste, 0: ibragglomeration in molds, by the method I have ah eady described elsewhere.

\\'hat I claim, and desire to secure by Letter-- Patent, is

1. The application of heat in the prepamtion of artificial-stone paste, either to the materials employed before being mixed, or to the mixttu'eol' the same during the process of tritnration, substantially in the manner and for the purpose set forth. r

2. The manufacture of artificial stones, 01-monolithie structures, by means and with the use of hot agglomerated artificial-stone paste, snhstantially prepared as herein set forth.

- FEANQOXS CUIGNET. [1,. .l

Witnesses:

EMILE BARRAe-Lr, l'i Boulerarll St. Martin S. Barman, i

Boulevard St. Martin, 17.

so as to oh- 

